Sean

Sean, also spelled Seán or Séan in Hiberno-English, is a masculine given name of Irish origin. It comes from the Irish versions of the Biblical Hebrew name Yohanan, Seán (anglicized as Shaun/Shawn/Shon) and Séan (Ulster variant; anglicized Shane/Shayne), rendered John in English and Johannes/Johann/Johan in other Germanic languages. The Norman French Jehan (see Jean) is another version.

In the Irish language, the presence and placement of the síneadh fada is significant, as it changes the meaning of the name. The word "Sean" in Irish means "old", while the word "Séan" means "omen".

For notable people named Sean, refer to List of people named Sean.

Origin
The name was adopted into the Irish language most likely from Jean, the French variant of the Hebrew name Yohanan. As Irish has no letter (derived from ; English also lacked  until the late 17th Century, with John previously been spelt Iohn) so it is substituted by, as was the normal Gaelic practice for adapting Biblical names that contain  in other languages (Sine/Siobhàn for Joan/Jane/Anne/Anna; Seonaid/Sinéad for Janet; Seumas/Séamus for James; Seosamh/Seòsaidh for Joseph, etc.). In 1066, the Norman duke, William the Conqueror conquered England, where the Norman French name Jahan/Johan came to be pronounced Jean, and spelled John. The Norman from the Welsh Marches, with the Norman King of England's mandate invaded parts of Leinster and Munster in the 1170s. The Irish nobility in these areas were replaced by Norman nobles, some of whom bore the Norman French name Johan or the anglicised name John. The Irish adapted the name to their own pronunciation and spelling, producing the name Seán (or Seathan). Sean is commonly pronounced (Irish: Seán ; (Ulster dialect: ) or  (Irish: Séan, with síneadh fada on , not , thus leading to the variant Shane.)

The name was once the common equivalent of John in Ireland and Gaelic-speaking areas of Scotland, but has been supplanted by a vulgarization of its address form: Iain or Ian. When addressing someone named Seán in Irish, it becomes a Sheáin, and in Scotland was generally adapted into Scots and Highland English as Eathain, Eoin, Iain, and Ian (John has traditionally been more commonly used in the Scots-speaking Lowlands than any form of Seán). Even in Highland areas where Gaelic is still spoken, these anglicisations are now more common than Seán or Seathan, undoubtedly due in part to registrars in the United Kingdom of Great Britain and Ireland and the United Kingdom of Great Britain and Northern Ireland having long been instructed not to register Irish or Gaelic names in birth or baptismal registrations.

North American usage
Some Irish bearers of the name, such as playwright Sean O'Casey and writer Seán Ó Faoláin, were originally named John but changed their names to demonstrate support for Ireland's independence. The name Sean was used by the 1920s for children born in the United States and became more widely used by the early 1940s. Along with spelling variants Shawn and Shaun, the name was among the top 1,000 names for American boys by 1950 and, with all spellings combined, was a top 10 name for American boys in 1971. The popularity of actor Sean Connery increased use of the name. The name Shaun was popularized in the late 1970s by singer Shaun Cassidy. It has since declined in use but, with all spellings combined, remained among the 300 most popular names for newborn American boys in 2022. The name is also in use for girls in the United States and Canada, with Shawn the most widely used spelling, perhaps due to its similarity to the name Dawn. Shawn was among the top 1,000 names for American girls between 1948 and 1988 and was at peak popularity as a name for girls there in 1970.

In other languages

 * English: Sean, Seon, Shane, Shayne, Shaine, Shon, Shaun, Shawn, Seann, Shaan
 * Sion, Shôn
 * Scottish Gaelic, Highland English and Scots: Eathain, Eoin, Iain, Ian
 * 션, 숀, 셔은, 쇼은
 * ショーン
 * 肖恩, 尚恩
 * شان
 * שון